@Override
protected Set<? extends OWLAxiom> createAxioms() {
Set<OWLAxiom> axioms = new HashSet<>();
OWLNamedIndividual ind = NamedIndividual(iri("i"));
OWLDataProperty prop = DataProperty(iri("prop"));
OWLLiteral literal = Literal("Test \"literal\"");
axioms.add(DataPropertyAssertion(prop, ind, literal));
OWLLiteral literal2 = Literal("Test 'literal'");
axioms.add(DataPropertyAssertion(prop, ind, literal2));
OWLLiteral literal3 = Literal("Test \"\"\"literal\"\"\"");
axioms.add(DataPropertyAssertion(prop, ind, literal3));
return axioms;
}